Determine the spring constant k4 (N/m) if the extension of the whole system is 1.04 m when a force of 23.49 N is applied. Use k1 = 18.49 N/m, k2 = 16.56 N/m, k3 = 26.43 N/m, and k5 = 36.61 N/m. (Use 2 decimal places for the final answer.)

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Forced undamped vibrations

In mechanical engineering, vibration is expressed as the term that occurs due to an object's backward and forward movement about a point of equilibrium. Generally, there are three types of vibrations which are,